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    <title>Document</title>
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    <ul>
        <li>1</li>
        <li>2</li>
        <li>3</li>
        <li>4</li>
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    <script>
        /* 
            数组的新方法
                Array.from => 将伪数组转换成真数组
        */
        let lis = document.querySelectorAll("li")
        //    console.log(lis);
        let ll = Array.from(lis)
        console.log(ll);
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